[vel0city]

External Thunderbolt GPU enclosures exist and can behave as a dock. A friend has one at his place, I can just plop my own cheap laptop in and it gets a massively upgraded GPU, access to a few monitors, USB PD, a USB hub with all the peripherals plugged in, and wired networking.

Its not all built into the monitor, but IMO having the several hundred dollar GPU outside of the monitor gives really good flexibility. The dock isn't much larger than the GPU and a few hundred watt power supply which you'd need anyways.

The only thing really missing from that equation is the extra CPU power and it being integrated into the monitor. But having a powerful CPU that scales down to be power friendly when on the go seems easier than finding a powerful GPU that doesn't suck the battery dry just rendering a desktop and a browser window.